Improvement in roofing-tiles



J. GREENAWALT.

ROOFING TILE. l Na.181,670 Patented Aug-.29,1876.

- UNITED STATES PATENT OEEIGE.

JACOB GREENAWALT, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN RO'OFLING-TILES.

Specification forming part of Letters Patent No. [81.670, dated August 29, 1876; application led July 28, 18'7 6.v

To all whom 'it may concern.-

Be it known that I, JAcoE GREENAWALT, of Pittsburg, Pennsylvania, have invented a new and usefulA Improvement in Roofing-Tile, which improvement is fully set forth in the following specification, reference being had to the accompanying drawing.

Similar letters of reference indicate corresponding parts.

The object of my invention is to effect a more perfect watershed in rootingtile of houses and other buildings; and consists, mainly, `in a system ot' overlapping joints formed by the peculiar construction and shape of the tile, by which means all the headingjoints are protected and covered, and at the same time the overlapping at the water-shed is eected, and all the advantages of such water-shed maintained; that also, when laid upon the roof, a beauty of appearance is given, and a protection against breakage afforded by the laying up solid of the tile against the sheathing ofthe roof.

In the accompanying drawing, Figure 1 shows a number of my tile as laid upon the root'` Fig. 2 shows the under surface of one of my tile detached from the roof.

A represents the top surface of the tile, and B the under surface. I will now proceed to describe the saine. l

Ihe upper edge of the tile, by the contiguration al a1 al, as shown in Fig. l`, is in the form of an obtuse angle, and in the directionot the comb of the roof, while the lower edge of the same presents substantially the same angle, a2 c2 a?, although for the purpose of ornamentation the tile is scalloped or made to present any ligure desired.

The heading-jointsf are formed for joining to and membering with the contiguous tiles in the same longitudinal row by cutting o' transversely that yportion of the points of the tiles to which the lap formed by the rabbet from c to Z12 extends.

The top surface of my tile is made plain, excepting the ridge E, the uses of which will be more fully hereinafter explained.

That part of the under side of the tile, as shown in Fig. 2, that rests upon the sheathing of the roof is made lozenge or diamond shaped, with the obtuse part of the angle in the direction of the comb and eaves of the roof, and the acute part of the angle in a longitudinal direction, as shown at b1 bl b1 and c c c. u

That part of the tile from the line c c c to b2 b2 b2 is rabbeted` on the under side of the same about one-half the thickness of the tile which forms the overlapping part.- The upper edge ot' the tile beingv made one-half the thickness of the lower edge, the shoulder c c c will iit up snugly to the top al a1 al of the tiles immediately below, and by means of the increased thickness of the lower end ofthe tile and the rabbet from c to b2 the tile are made to lie up solid to the sheathing ot' the roof, at the same time to overlap each other for shedding the Water. heading-joints are also covered.

In the under side of the overlapping part of the tile is a rounded groove, D, which is made to fit over the ridge E upon the top of the overlapping tile fbelow it. The uses of the groove D and ridge E are Ito protect more fully the watershed in a dashing rain upon the root', or from wind driving the water over the top al al al bf the tile, and also as a protection against melting snow and ice, and from absorption from the under or dry side of the tile.

` For the purpose yof a more complete watershed, I make my tile diamond or lozenge shaped, with the long points or acute angles thereotl joining the contiguous tiles longitudinally upon the roof. By elongating the tiles in this direction the angle at the water-shed is made obtuse, thereby raising the top of the tile nearer a level with the roof.

It will be seen that the nearer the Watershed of the tile approaches a straight line longitudinally across the roof the greater the protection. afforded in shedding the Water; and in order to maintain the scale shape of the tile and' effect a covering and protection of the heading-joints, (which is done at the risk of the water-shed at the lower or overlapping part,)`1 make the angle in the direction of the width ofthe root' as obtuse as possible, and at the same time maintain the features as above stated.

By the shape of the tile the,

Having thus described my invention, what e tbz, ridge E, and groove D, substantially as I claim, and desire to secure by Letters Patf ent, iscle of manufacture. e

Alozenge or diamond shaped roofing-tile, vJACOB GREENAWALT.

elongated longitudinally across the roof, in- Witnesses:

creasing in thickness from the upper to the Jos. C. NELSON, e

lower edge, and having the rabbet from cato LIZZIE M. GREENAWALT.

and for the purpose described, as a new artiw 

